J/AJ/169/103ivo://CDS.VizieR/J/AJ/169/103doi:10.26093/cds/vizier/be-59-37CDSMurthy J.Shull J.M.Postman M.Parker J.W.Redfield S.,Cunningham N.Gladstone G.R.Pineau J.P.Brandt P.Verbiscer A.J.,Singer K.N.Weaver H.A.Henry R.C.Stern S.A.2026-07-02T11:45:14Z2025-12-03T10:50:12ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frspectroscopyultraviolet-astronomyWe present new observations of the cosmic ultraviolet background (CUVB) at high Galactic latitudes (|b|>40{deg}), made using the Alice UV spectrograph on board the New Horizons spacecraft. These observations were taken at about 57AU from the Sun, outside much of the foreground emission affecting previous missions, and allowed a new determination of the spectrum of the CUVB between 912-1100{AA} and 1400-1800{AA}. We found a linear correlation between the CUVB and the Planck E(B-V) with offsets at zero-reddening of 221+/-11 photon units at 1000{AA} and 264+/-24 photon units at 1500{AA} (4.4+/-0.2nW/m2/sr at 1000{AA} and 5.3+/-0.5nW/m/sr at 1500{AA}). The former is the first firm detection of the offset in the range 912-1100{AA} while the latter result confirms previous results from the Galaxy Evolution Explorer, showing that there is little emission from the solar system from 1400 to 1800{AA}. About half of the offset may be explained by known sources (the integrated light of unresolved galaxies, unresolved stars, emission from ionized gas, and two-photon emission from warm hydrogen in the halo) with the source of the remaining emission as yet unidentified. There is no detectable emission below the Lyman limit with an upper limit of 3.2+/-3.0 photon units.2025AJ....169..103Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/169/103CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/411/447 : Interstellar NaI D-line (Lallement+, 2003)J/ApJ/724/1389 : Mapping the diffuse UV sky with GALEX (Murthy+, 2010)J/ApJ/818/187 : The cosmic TeV gamma-ray background spectrum (Inoue+, 2016)J/A+A/557/L1 : WMAP cosmic microwave background data (Rassat+, 2013)J/A+A/591/A50 : CMB intensity map from WMAP and Planck PR2 data (Bobin+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/169/103https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/169/103http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/169/103https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/169/103https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/169/103http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/169/103GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/169/103/table2 (Survey field centers and observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/169/103/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/169/103/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/169/103/table2?GETtext/xml+votable180.050000true359.559-23.6540.0055555555555555566/8439 8634 8651 8734 9750 9922 9939 10119 16626 16685 16759 16781 16888 20048 26058 26373 30805 33676 34951 34968 35433 35456 35559 35568 35611 35734 35814 47073https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/169/103?format=asciiUVdefaultJ/AJ/169/103/table2Survey field centers and observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDField identifiermeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDateDate of observation (UT)'Y:M:D'time.epoch;obsnullableMETMission elapsed time (from launch on 14:00 ET on 2006-01-19) of the first image in each field sequencestime.epochlSGalactic longitude of the Stem (1)degpos.galactic.lonfloatbSGalactic latitude of the Stem (1)degpos.galactic.latfloatlBGalactic longitude of the Box (1)degpos.galactic.lonfloatbBGalactic latitude of the Box (1)degpos.galactic.latfloatE(B-V)S[0.01/0.75] Color excess mean values in the Stem (2)phot.color.excessfloatE(B-V)B[0.01/0.6] Color excess mean values in the Box (2)phot.color.excessfloatBoxSpBox spectrum with link to interactive plot (column added by CDS)meta.codecharStemSpStem spectrum with link to interactive plot (column added by CDS)meta.codecharBoxFITSLink to the spectrum file in FITS format (column added by CDS) (3)meta.id;meta.filecharStemFITSLink to the spectrum file in FITS format (column added by CDS) (3)meta.id;meta.filechar